Annotation of libelwix/src/iov.c, revision 1.2
1.2 ! misho 1: /*************************************************************************
! 2: * (C) 2021 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
! 3: * by Michael Pounov <misho@elwix.org>
! 4: *
! 5: * $Author: misho $
! 6: * $Id: iov.c,v 1.1.2.5 2021/03/21 01:31:07 misho Exp $
! 7: *
! 8: **************************************************************************
! 9: The ELWIX and AITNET software is distributed under the following
! 10: terms:
! 11:
! 12: All of the documentation and software included in the ELWIX and AITNET
! 13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
! 14:
! 15: Copyright 2004 - 2021
! 16: by Michael Pounov <misho@elwix.org>. All rights reserved.
! 17:
! 18: Redistribution and use in source and binary forms, with or without
! 19: modification, are permitted provided that the following conditions
! 20: are met:
! 21: 1. Redistributions of source code must retain the above copyright
! 22: notice, this list of conditions and the following disclaimer.
! 23: 2. Redistributions in binary form must reproduce the above copyright
! 24: notice, this list of conditions and the following disclaimer in the
! 25: documentation and/or other materials provided with the distribution.
! 26: 3. All advertising materials mentioning features or use of this software
! 27: must display the following acknowledgement:
! 28: This product includes software developed by Michael Pounov <misho@elwix.org>
! 29: ELWIX - Embedded LightWeight unIX and its contributors.
! 30: 4. Neither the name of AITNET nor the names of its contributors
! 31: may be used to endorse or promote products derived from this software
! 32: without specific prior written permission.
! 33:
! 34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
! 35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 44: SUCH DAMAGE.
! 45: */
! 46: #include "global.h"
! 47:
! 48:
! 49: /*
! 50: * iov_Init() - Init new iovec array
! 51: *
! 52: * return: =NULL error, !=NULL ready array
! 53: */
! 54: iovec_t *
! 55: iov_Init()
! 56: {
! 57: iovec_t *iov;
! 58:
! 59: iov = e_malloc(sizeof(iovec_t));
! 60: if (iov)
! 61: memset(iov, 0, sizeof(iovec_t));
! 62:
! 63: return iov;
! 64: }
! 65:
! 66: /*
! 67: * iov_Destroy() - Destroy iovec array
! 68: *
! 69: * @iov = iovec array
! 70: * return: none
! 71: */
! 72: void
! 73: iov_Destroy(iovec_t ** __restrict iov)
! 74: {
! 75: if (iov && *iov) {
! 76: if ((*iov)->iov_array)
! 77: e_free((*iov)->iov_array);
! 78: e_free((*iov));
! 79: *iov = NULL;
! 80: }
! 81: }
! 82:
! 83: /*
! 84: * iov_Get() - Get data and length from position
! 85: *
! 86: * @iov = iovec array
! 87: * @pos = position
! 88: * @data = data
! 89: * @datlen = data length
! 90: * return: -1 error, 0 ok
! 91: */
! 92: int
! 93: iov_Get(iovec_t * __restrict iov, u_int pos, void *data, size_t *datlen)
! 94: {
! 95: if (!iov || !data || !datlen)
! 96: return -1;
! 97:
! 98: if (pos >= iov->iov_size)
! 99: return -1;
! 100:
! 101: *datlen = MIN(*datlen, iov->iov_array[pos].iov_len);
! 102: memcpy(data, iov->iov_array[pos].iov_base, *datlen);
! 103:
! 104: return 0;
! 105: }
! 106:
! 107: /*
! 108: * iov_Insert() - Insert data at position into array
! 109: *
! 110: * @iov = iovec array
! 111: * @pos = position
! 112: * @data = data
! 113: * @datlen = data length
! 114: * return: -1 error, 0 ok
! 115: */
! 116: int
! 117: iov_Insert(iovec_t * __restrict iov, u_int pos, void *data, size_t datlen)
! 118: {
! 119: struct iovec *iv;
! 120:
! 121: if (!iov)
! 122: return -1;
! 123:
! 124: if (pos >= iov->iov_size) {
! 125: iv = e_realloc(iov->iov_array, sizeof(struct iovec) * (pos + 1));
! 126: if (!iv)
! 127: return -1;
! 128:
! 129: iov->iov_array = iv;
! 130: iov->iov_size = pos + 1;
! 131: }
! 132:
! 133: iov->iov_array[pos].iov_base = data;
! 134: iov->iov_array[pos].iov_len = datlen;
! 135:
! 136: return 0;
! 137: }
! 138:
! 139: /*
! 140: * iov_Delete() - Delete data at position into array
! 141: *
! 142: * @iov = iovec array
! 143: * @pos = position
! 144: * @mustfree = data must be free before delete
! 145: * return: -1 error, 0 ok
! 146: */
! 147: int
! 148: iov_Delete(iovec_t * __restrict iov, u_int pos, int mustfree)
! 149: {
! 150: if (!iov)
! 151: return -1;
! 152:
! 153: if (pos < iov->iov_size) {
! 154: if (mustfree)
! 155: e_free(iov->iov_array[pos].iov_base);
! 156: memset(iov->iov_array + pos, 0, sizeof(struct iovec));
! 157: }
! 158:
! 159: return 0;
! 160: }
! 161:
! 162: /*
! 163: * iov_Push() - Push data on first free position
! 164: *
! 165: * @iov = iovec array
! 166: * @data = data
! 167: * @datlen = data length
! 168: * return: -1 error, !=-1 pushed at position
! 169: */
! 170: int
! 171: iov_Push(iovec_t * __restrict iov, void *data, size_t datlen)
! 172: {
! 173: register int pos;
! 174:
! 175: if (!iov)
! 176: return -1;
! 177:
! 178: for (pos = 0; pos < iov->iov_size; pos++)
! 179: if (!iov->iov_array[pos].iov_len && !iov->iov_array[pos].iov_base)
! 180: break;
! 181:
! 182: if (iov_Insert(iov, pos, data, datlen))
! 183: return -1;
! 184:
! 185: return (int) pos;
! 186: }
! 187:
! 188: /*
! 189: * iov_Pop() - Pop data from last used position
! 190: *
! 191: * @iov = iovec array
! 192: * @data = data
! 193: * @datlen = data length
! 194: * @mustfree = data must be free before delete
! 195: * return: -1 error, !=-1 poped from position
! 196: */
! 197: int
! 198: iov_Pop(iovec_t * __restrict iov, void *data, size_t *datlen, int mustfree)
! 199: {
! 200: register int pos;
! 201:
! 202: if (!iov)
! 203: return -1;
! 204:
! 205: if (iov->iov_size < 1)
! 206: return 0;
! 207:
! 208: for (pos = iov->iov_size - 1; pos >= 0; pos--)
! 209: if (iov->iov_array[pos].iov_base)
! 210: break;
! 211:
! 212: iov_Get(iov, pos, data, datlen);
! 213: iov_Delete(iov, pos, mustfree);
! 214: return (int) pos;
! 215: }
! 216:
! 217: /*
! 218: * iov_PushPair() - Push pair/named data on first free position
! 219: *
! 220: * @iov = iovec array
! 221: * @name = name of data
! 222: * @data = data
! 223: * @datlen = data length
! 224: * return: -1 error, !=-1 pushed at position
! 225: */
! 226: int
! 227: iov_PushPair(iovec_t * __restrict iov, const char *name, void *data, size_t datlen)
! 228: {
! 229: char *str;
! 230: int pos;
! 231:
! 232: if (!iov)
! 233: return -1;
! 234:
! 235: str = e_strdup(name);
! 236: if (!str)
! 237: return -1;
! 238: if (datlen == (size_t) -1) {
! 239: if (data)
! 240: datlen = strlen(data) + 1;
! 241: else
! 242: datlen = 0;
! 243: }
! 244:
! 245: if ((pos = iov_Push(iov, str, strlen(str) + 1)) == -1) {
! 246: e_free(str);
! 247: return -1;
! 248: }
! 249: if (iov_Push(iov, data, datlen) == -1) {
! 250: iov_Delete(iov, pos, 42);
! 251: return -1;
! 252: }
! 253:
! 254: return pos;
! 255: }
! 256:
! 257: /*
! 258: * iov_PopPair() - Pop pair/named data from last used position
! 259: *
! 260: * @iov = iovec array
! 261: * @name = name of data
! 262: * @namlen = name length
! 263: * @data = data
! 264: * @datlen = data length
! 265: * @mustfree = data must be free before delete
! 266: * return: -1 error, !=-1 poped from position
! 267: */
! 268: int
! 269: iov_PopPair(iovec_t * __restrict iov, char *name, size_t *namlen,
! 270: void *data, size_t *datlen, int mustfree)
! 271: {
! 272: int pos;
! 273:
! 274: if (!iov)
! 275: return -1;
! 276:
! 277: if (iov_Pop(iov, data, datlen, mustfree) == -1)
! 278: return -1;
! 279: if ((pos = iov_Pop(iov, name, namlen, 42)) == -1)
! 280: return -1;
! 281:
! 282: return pos;
! 283: }
! 284:
! 285: /*
! 286: * iov_FreePairs() - Free pairs/named data in iovec array
! 287: *
! 288: * @iov = iovec array
! 289: * @mustfree = data must be free before delete
! 290: * return: -1 error or 0 ok
! 291: */
! 292: int
! 293: iov_FreePairs(iovec_t * __restrict iov, int mustfree)
! 294: {
! 295: register int pos;
! 296:
! 297: if (!iov)
! 298: return -1;
! 299:
! 300: if (iov->iov_size < 1)
! 301: return 0;
! 302:
! 303: for (pos = 0; pos < (iov_Size(iov) & ~1); pos += 2) {
! 304: if (iov->iov_array[pos].iov_base)
! 305: iov_Delete(iov, pos, 42);
! 306: if (iov->iov_array[pos + 1].iov_base)
! 307: iov_Delete(iov, pos + 1, mustfree);
! 308: }
! 309:
! 310: return 0;
! 311: }
! 312:
! 313: /*
! 314: * iov_Debug() - Debug of iovec array
! 315: *
! 316: * @iov = iovec array
! 317: * return: none
! 318: */
! 319: void
! 320: iov_Debug(iovec_t * __restrict iov)
! 321: {
! 322: register size_t pos;
! 323:
! 324: if (!iov)
! 325: return;
! 326:
! 327: printf("iov_size=%zu iov_array=%p\n", iov->iov_size, iov->iov_array);
! 328: for (pos = 0; pos < iov->iov_size; pos++)
! 329: printf("IOVEC[%zu] base=%p len=%zu (%s)\n", pos, iov->iov_array[pos].iov_base,
! 330: iov->iov_array[pos].iov_len, (char*) iov->iov_array[pos].iov_base);
! 331: }
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